よむ Firefox

よむ

Read any of 33 learning languages on any page with target-aware pop-up definitions, subtitles, OCR, and Study. Japanese adds furigana and pitch.

Features & Capabilities

Read where you already read.

Yomu makes text, subtitles, and images in your selected learning language tappable. Click or hover a word to see target-aware definitions, pronunciation, examples, and study status. It works on ordinary web pages, YouTube subtitles, manga and images through OCR, and local files when you allow file access.

All 33 learning targets share the reading, lookup, mining, and review loop. Japanese is the deepest target, adding furigana, pitch accent, kanji cards, and more grammar. Import compatible Yomitan dictionaries for local lookup; optional connected sources such as Jiten, JPDB, Bunpro, WaniKani, and Anki remain available where they support the selected target.

Choose how pages are handled: leave them unchanged, scan the selected language automatically, or scan only when you ask. The extension also includes a focused Study page. Open Study from Yomu's toolbar whenever you want it; Yomu never replaces or redirects the browser's new-tab page.

Highlights <ul><li>Target-aware pop-up lookup for 33 learning languages</li><li>Clickable subtitles and image OCR</li><li>Local compatible Yomitan dictionary imports</li><li>Vocabulary and sentence review in Study</li><li>Furigana, pitch accent, kanji, and deeper grammar for Japanese</li><li>English and Japanese interface</li><li>No remote executable code and no sale of personal data</li></ul> Site access is needed because the extension's single purpose is to annotate the selected learning language wherever it appears. Page text is processed locally except when you explicitly use a lookup, OCR, or sync service that you configured.

User Growth & Download Statistics

Manifest V3 Add-on
By:
Henry Russell
Daily users:
2 1
Rating:
5.00
(1)
Version:
1.9.2 Last updated: 2026-08-14
Version code:
6414917
Creation date:
2026-07-19
Risk:
Moderate risk impact High risk likelihood
Permissions:
Host permissions:
  • <all_urls>
Content scripts matches:
  • *
Size:
3.05MB
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-08-17
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Henry Russell
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/yomu-reader/
Website:
https://github.com/HRussellZFAC023/yomu-reader/issues

Is よむ Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

よむ requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

よむ is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** ******** ****** *** ********** *** *** ** ****** ** *****
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Good **** ********* *** **** **** *******
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